I used to have this cat, that just walked into our apartment one day. We had two other cats at the time. He just kind of seemed to adopt us. About a month or two later we move and took him with us. He'd come and go as he pleased. At first it would only be about a day, then it would be a week, then he'd show up every month or two. I knew he had to be eating somewhere because if anything he gained weight. As he was doing this, he would get REALLY mean when he'd come around. One time I picked him up to move him to a different room, because my daughter was about 7 months old at the time and I didn't want her to go near him, because I didn't know how'd he react towards her, especially if she decided to pull on him, and he wound up tearing a hole in my shirt with his claws. Eventually the cat stopped coming around. I was just wondering if this was common behavior with cats?